I actually don't think overpopulation is the problem. It's the way we're going about resource usage that's the problem. If people stayed home more, grow food and instead of focus on society feeding them, they feed themselves we wouldn't be inundated with non-stop scale issues. As insane as it sounds distributed technologies seem to be saving tech - it can save humanity too. We just don't train people to be like that. Instead we teach greed and outperforming the next guy.
Overpopulation is not a problem because the current population is under the limit of the amount of people the Earth can feed and most models think the current trend will reverse before we pass that point. For the rest, you have it backward. The only reason we can feed that many people is the green revolution. Subsistence farming is simply not productive enough. It would have led to famine as soon as sixty years ago.
